Floor-sander.



J. G. HENDERSON.

FLOOR SANDER.

APPLIOATION FILED JUNE 8, 190g.

91 5,597. Patented Mar. 16, 1909.

I lnren/l' bzr affected by the raising or lowering of the attached to the rear thereof.

UNITED STATES PATENT OFFICE;

JOHN HENDERSON, OF CHICAGO, ILLINOIS.

. FLOOR-SANDER.

To all whom it may concern:

Be it known that I, JOH G. HENDERSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Im rovements in Floor-Sanders, of which the fo owing is a specification.

The object of this invention is to construct a machine to run by power to sandpaper floors ready to varnish. To do this, I prov de a two wheeled truck with a pair of earmgs' upon which rest a motor, to the shaft of which is directly connected a sandpaper drum. The preponderance of weight 1s on the drum end and is sufficient to hold the drum end to its work. The pressure of the drum on the floor is uniform and is not handle. The truck is moved over the floor by its handle, while the drum, being driven by the motor with great speed, does the sand papering. With a narrow drum Working in View of the operator and completely. under his control, it will level the joinings and polish the floor without being disturbed by the undulations that are found in all floors.

The object of mounting the motor and sandpapering drum on trunnions is to detach the Welght of the motor from the pressure of the drum, as I have found that it is impossible to gage the pressure on the drum i with sufficient accuracy when the weight of the motor affects the ressure of the drum.

To enable others ski led in the art to make and use my invention, I proceed to describe its construction and operation by means of the accompanying drawings, in which Figure 1 is a perspective view of the ma chine in operation. Fig. 2 is a front vicw-- Fig. 3 is a side View.

Similar letters refer to similar parts in each figure.

L is a truck comprising a rigid frame with a wheel on each s de and a handle rigidly An open bearing is provided at the front and'at the rear ends of the truck. A cylindrical casing A, containing a motor, is rovided with trun- -nions I on opposite si es of its periphery I about midway. its length. These trunnions i I rest in the bearings on the truck L. 1

Patented March 16, 1909.

A sand paper drum C is secured directly to the rotary shaft M of the motor by means of a nut K. A band of sand paper is removably secured to the drum. The drum and the motor are so balanced on the bearings of the truck that the preponderance of weight is on the drum end. A small leaf spring N is secured to the truck frame, and the free end thereof may be made to act against a pin on the motor casing to slightly increase the pressure of the drum on the floor when deemed necessary.

The motor and casing can readily be reversed on the trunnion bearings so as to work on either side of the truck.

The truck can be moved over the floor by means of thehandle while the motor drives the sand paper drum with great speed, thereby evening the joinings and smoothing the floor preparatory to varnishing.

Having thus described my invention, What I claim is 1. Ina floor sander: the combination of a wheeled truck provided with a pair of bearings, a casing provided with apair of trunnions and mounted in said'bearings so as to be capable of oscillating, a motor within the casing and provided with a shaft extending outwardly from the side of the truck, and a ,sandin'g drum mounted on the extended shaft substantially as described.

2. In a floor sander: the combination of a wheeled truck provided with a pair of bearings, a casing provided with a pair of trunnions and mounted in said bearings so as to be capable of oscillating, a motor within the casing and provided with a shaft extending outwardly from the side of the truck, and a sanding drum mounted on the extended shaft, and a handle to said truck whereby the operator-can move it over the floor as re uired, substantially as described.

n testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN G. HENDERSON.

Witnesses:

G. E. CHURCH, L. B. CoUPLAND. 

